multiple-inheritance

Possible Duplicate: C++ pointer multi-inheritance fun. (Follow up on: C++ pointer multi-inheritance fun ) I'm writing some code involving inheritance from a basic ref-counting pointer class; and some intricacies of C++ popped up. I've reduced it as follows: Suppose I have: class A{int x, y;}; class B{int xx, yy;}; class C: public A, public B {int z;}; C c; C* pc = &c; B* pb = &c; A* pa = &c; // does pa point to a valid A object? // does pb point to a valid B object? // does pa == pb ? Furthermore, does: // pc == (C*) pa ? // pc == (C*) pb ? Thanks! Here, "==" means points at the same value.

I'm a Java programmer, learning to program in Go. So far I really like the language. A LOT more than Java. But there's one thing I'm a bit confused about. Java has interfaces because classes can inherit only from one class. Since Go allows multiple inheritance, what's the point of interfaces? Polymorphism Interfaces enable functions to have a 'placeholder' parameter which can take different structs as an argument. For example, if structs Man, Woman, Child implement interface Human, then a method with the parameter Human can take any of the structs Man, Woman, Child as an argument. Hence, the

I recently ported a project from VS2008 to VS2013 and ran into some stack corrupt issues. After some research I could pinpoint the cause to the following code: class CInternalInterface { afx_msg void OnMouseMove(UINT, CPoint) = 0; }; class CMyDlg : public CDialog, public CInternalInterface { afx_msg void OnMouseMove(UINT, CPoint); } BEGIN_MESSAGE_MAP(CMyDlg, CDialog) ON_WM_MOUSEMOVE() END_MESSAGE_MAP() The compiler issued a "warning C4407: cast between different pointer to member representations, compiler may generate incorrect code" at the ON_WM_MOUSEMOVE() statement and at runtime the stack

So, I have multiple ReactComponent. Initially, I was thinking that there will be sort of a parent component (let's call this GrandPa) with its own state, and it will pass down some info about its state to another component (call it Parent). Similarly, Parent passes some of his to Child and child to GrandChild. So we have the hierarchy: GrandPa -> Parent -> Child -> GrandChild However, I quickly realized that when I change the state of GrandPa with method this.setState(prevState => (<new state based on prevState>)) , the changes do not cascade down the channel. Another problem I realized is

This question already has an answer here: c++ virtual inheritance 3 answers In multiple inheritance, I have a virtual Base class which is inherited by class A and class B . A and B are base classes of AB . Please see the code below. In constructor of A and B , Base(string) constructor is called. I am expecting to get following output: Base::Base(std::string) A::A() B::B() But I am getting following output: Base::Base() A::A() B::B() Why default constructor of Base is being called? #include<iostream> #include<string> using namespace std; class Base{ public: Base(){ cout<<__PRETTY_FUNCTION__<